1/* See LICENSE file for copyright and license details. */
  2#include "dwm.h"
  3#include <regex.h>
  4#include <stdio.h>
  5#include <stdlib.h>
  6#include <string.h>
  7#include <X11/Xatom.h>
  8#include <X11/Xutil.h>
  9
 10/* static */
 11
 12typedef struct {
 13	const char *prop;
 14	const char *tags;
 15	Bool isfloating;
 16} Rule;
 17
 18typedef struct {
 19	regex_t *propregex;
 20	regex_t *tagregex;
 21} Regs;
 22
 23TAGS
 24RULES
 25
 26static Regs *regs = NULL;
 27static unsigned int nrules = 0;
 28static char prop[512];
 29
 30static void
 31persistconfig(Client *c) {
 32	unsigned int i;
 33
 34	for(i = 0; i < ntags && i < sizeof prop - 1; i++)
 35		prop[i] = c->tags[i] ? '1' : '0';
 36	if(i < sizeof prop - 1)
 37		prop[i++] = c->isfloating ? '1' : '0';
 38	prop[i] = '\0';
 39	XChangeProperty(dpy, c->win, dwmconfig, XA_STRING, 8,
 40			PropModeReplace, (unsigned char *)prop, i);
 41}
 42
 43static unsigned int
 44idxoftag(const char *tag) {
 45	unsigned int i;
 46
 47	for(i = 0; i < ntags; i++)
 48		if(tags[i] == tag)
 49			return i;
 50	return 0;
 51}
 52
 53/* extern */
 54
 55void
 56compileregs(void) {
 57	unsigned int i;
 58	regex_t *reg;
 59
 60	if(regs)
 61		return;
 62	nrules = sizeof rule / sizeof rule[0];
 63	regs = emallocz(nrules * sizeof(Regs));
 64	for(i = 0; i < nrules; i++) {
 65		if(rule[i].prop) {
 66			reg = emallocz(sizeof(regex_t));
 67			if(regcomp(reg, rule[i].prop, REG_EXTENDED))
 68				free(reg);
 69			else
 70				regs[i].propregex = reg;
 71		}
 72		if(rule[i].tags) {
 73			reg = emallocz(sizeof(regex_t));
 74			if(regcomp(reg, rule[i].tags, REG_EXTENDED))
 75				free(reg);
 76			else
 77				regs[i].tagregex = reg;
 78		}
 79	}
 80}
 81
 82Bool
 83isvisible(Client *c) {
 84	unsigned int i;
 85
 86	for(i = 0; i < ntags; i++)
 87		if(c->tags[i] && seltag[i])
 88			return True;
 89	return False;
 90}
 91
 92void
 93settags(Client *c, Client *trans) {
 94	unsigned int i, j;
 95	regmatch_t tmp;
 96	Bool matched = trans != NULL;
 97	XClassHint ch = { 0 };
 98	XTextProperty name;
 99
100	if(matched) {
101		for(i = 0; i < ntags; i++)
102			c->tags[i] = trans->tags[i];
103	}
104	else {
105		/* check if window has set a property */
106		name.nitems = 0;
107		XGetTextProperty(dpy, c->win, &name, dwmconfig);
108		if(name.nitems && name.encoding == XA_STRING) {
109			strncpy(prop, (char *)name.value, sizeof prop - 1);
110			prop[sizeof prop - 1] = '\0';
111			XFree(name.value);
112			for(i = 0; i < ntags && i < sizeof prop - 1 && prop[i] != '\0'; i++)
113				if((c->tags[i] = prop[i] == '1'))
114					matched = True;
115			if(i < sizeof prop - 1 && prop[i] != '\0')
116				c->isfloating = prop[i] == '1';
117		}
118	}
119	if(!matched) {
120		/* rule matching */
121		XGetClassHint(dpy, c->win, &ch);
122		snprintf(prop, sizeof prop, "%s:%s:%s",
123				ch.res_class ? ch.res_class : "",
124				ch.res_name ? ch.res_name : "", c->name);
125		for(i = 0; i < nrules; i++)
126			if(regs[i].propregex && !regexec(regs[i].propregex, prop, 1, &tmp, 0)) {
127				c->isfloating = rule[i].isfloating;
128				for(j = 0; regs[i].tagregex && j < ntags; j++) {
129					if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
130						matched = True;
131						c->tags[j] = True;
132					}
133				}
134			}
135		if(ch.res_class)
136			XFree(ch.res_class);
137		if(ch.res_name)
138			XFree(ch.res_name);
139	}
140	if(!matched)
141		for(i = 0; i < ntags; i++)
142			c->tags[i] = seltag[i];
143	persistconfig(c);
144}
145
146void
147tag(const char *arg) {
148	unsigned int i;
149
150	if(!sel)
151		return;
152	for(i = 0; i < ntags; i++)
153		sel->tags[i] = arg == NULL;
154	i = idxoftag(arg);
155	if(i >= 0 && i < ntags)
156		sel->tags[i] = True;
157	persistconfig(sel);
158	arrange();
159}
160
161void
162togglefloating(const char *arg) {
163	if(!sel || isfloating())
164		return;
165	sel->isfloating = !sel->isfloating;
166	if(sel->isfloating) {
167		resize(sel, sel->x, sel->y, sel->w, sel->h, True);
168		persistconfig(sel);
169	}
170	arrange();
171}
172
173void
174toggletag(const char *arg) {
175	unsigned int i, j;
176
177	if(!sel)
178		return;
179	i = idxoftag(arg);
180	sel->tags[i] = !sel->tags[i];
181	for(j = 0; j < ntags && !sel->tags[j]; j++);
182	if(j == ntags)
183		sel->tags[i] = True;
184	persistconfig(sel);
185	arrange();
186}
187
188void
189toggleview(const char *arg) {
190	unsigned int i, j;
191
192	i = idxoftag(arg);
193	seltag[i] = !seltag[i];
194	for(j = 0; j < ntags && !seltag[j]; j++);
195	if(j == ntags)
196		seltag[i] = True; /* cannot toggle last view */
197	arrange();
198}
199
200void
201view(const char *arg) {
202	unsigned int i;
203
204	for(i = 0; i < ntags; i++)
205		seltag[i] = arg == NULL;
206	i = idxoftag(arg);
207	if(i >= 0 && i < ntags)
208		seltag[i] = True;
209	arrange();
210}